8978381 has 2 divisors, whose sum is σ = 8978382. Its totient is φ = 8978380.

The previous prime is 8978377. The next prime is 8978449. The reversal of 8978381 is 1838798.

8978381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5522500 + 3455881 = 2350^2 + 1859^2 .

It is a cyclic number.

It is not a de Polignac number, because 8978381 - 2² = 8978377 is a prime.

It is a super-2 number, since 2×8978381² = 161222650762322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8978311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4489190 + 4489191.

It is an arithmetic number, because the mean of its divisors is an integer number (4489191).

Almost surely, 2^8978381 is an apocalyptic number.

It is an amenable number.

8978381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8978381 is an equidigital number, since it uses as much as digits as its factorization.

8978381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 8978381 is about 2996.3946669289. The cubic root of 8978381 is about 207.8416956852.

The spelling of 8978381 in words is "eight million, nine hundred seventy-eight thousand, three hundred eighty-one".